Means for balancing turbines and pumps.



W. H. EYERMANN. MEANS FOR BALANCING TURBINES AND PUMPS.

. APPLICATION FILED AUG.12, 2.907. 958,6 1 2..

Patented May 17, 1910.

WILHELM HEINRICH EYERMANN,

E DEUTSCH-WILMERSDORF, NEAR BERLIN,

GERMANY. 4

MEANS FOR BALANCING T'URBINES AND I PUMPS.

7 Specification of Letters Patent. Application filed August 12, 1907. Serial No. 388,223.

Patented May 17, 1910.

To all whom it concern:

Be it known that I, WILHELM HEINRICH EYERMANN, a subject of the German Emperor, and resident of Deutsch-Wilmersdorf,

near Berlin, Germany, have invented new and useful Means for Balancing Turbines and Pumps, of which the following is a specification.

Rotating bodies driven .by a fluid such as water, steam or gas passing through them or which pump or otherwise'act on such a fluid in most cases have a tendency to move axially, due to the action of the passing fluid, and therefore varying with the pressure or resistance of the latter.

pressure may be advantageously replaced by the device'hereinafter described and forming the subject of this invention.

her A of the casing, is conveyed by the blades B of the rotating disk into the chanr ber C and discharged therefrom. The pres sure in the chamber A is therefore that of the suction, and inthe chamber C that of the discharge. If the fluid were to ass freely from the chamber G to the back 0 the wheel and could not esca therefrom, this would result in an axia pressure on the wheel or disk and on the spindle toward the right. In order to avoid this, the wheel or disk is provided at D with a labyrinth packing valve or the like which admits only a small quantity of liquid to the chamber E. From the chamber E the fluid can pass through a small slot F formed preferably by annular projefctions on the disk and the easing, into the chamber G, and thence escape through the passages H Into A. If now the pressure for instance toward the left is greater, then the spindle will first move toward the left. That wouldhowever reduce The thrust bear-- ings generally used for taking up this axial the slot F, so that less liquid would escap from the chamber E than is admitted through the passages of the acking D. Consequently the pressure in tinue to rise until it balances the original pressure toward the left. i of the fluid changes, then the pressure in the chamber E will also change, automatically willu'con If the pressure as the latter is in communication with the exhaust and discharge chamber, and the pressure in E thus adapts itself to any-conditions of working.

Instead of a simple valve or device as above described several such devices or valves could be used throu h which fluid would pass consecutively an which would be moved simultaneously and in the same direction, in order to strengthen the action.

As the device described takes an appreciable though very short time, before coming into action, sudden axial shocks or changes of pressure might bring the disk into contact with the casing; In order to avoid this there are added two other de'viceswhich can be preferably combined in one part, namely a device for limiting the movement of the retarding the movement of the same. The

. said two devices are combined in the construction shown in Figure l, in the collar I firmly secured to the spindle, and in the chamber K which issecured to the um tion, so that in the event of an axial move ment of the. spindle, the liquid could pass only-slowly from one side of the collar to the other. The axial play of the collar in the chamber is calculated in such a manner that while allowing the movement of the spindle required for perfectly balancing the pressure, it makes it impossi l to come intocontact with the casing.

The device can be used for pumps, blowers, turbines, for wez king with water, steam or other fluids. parts of combined machines of this 'kind. I claim- 1. In means for balancing turbines and pumps, the combination of ashell provided with a central out awa portion, a runner provided with a spind c, said 'casin and runner being provided with a serles of interpenetratmg'rings 'which coact together,

e for the disk" I.

Ti calf 'ffiepplied to single.

Q enema formin a passage'of variable area between sage, the raised portion 0 the runnersurrounding said cut away portion ooacting with the raised portion on the shell to form a passage of variable area, substantially as described.

2.111 means for balancing turbines and pumps, the combination of a shell provided with a central cut awa portion, a runner provided with aspind e, said casing and runner bein' provided with a series of interpenetrating rings which coact together,- forming a passage of variable area between the shell and the runner, said runner being provided with a passage leading therethrou h and with a cut away portion surroun mg the spindle on one side of said runner and communicatin with said passage, the raised portion 0 the runner surrounding said cut away portion ooactmg with the raised portion on the shellto form a passage of variable area, and a dash-pot for preventing1 too rapid movement of the spin le lengt scribed;

In stimony, that I claim the foregoing as In Jinventiornl have signed my name in presence of two witnesses, this 30th day of, July 1907;

1. WILHELM HEINRICH EYERMANN. Witnesses:

WoLDEMAn HAUPT,

A HENRY HAsPnn.

wise, substantially as do 

